[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 19.882138] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. [ 20.441154] random: sshd: uninitialized urandom read (32 bytes read) [ 20.683300] random: sshd: uninitialized urandom read (32 bytes read) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 21.417249] random: sshd: uninitialized urandom read (32 bytes read) [ 21.574267] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.25' (ECDSA) to the list of known hosts. [ 27.045846] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 27.136437] WARNING: CPU: 1 PID: 4507 at include/net/sock.h:644 smc_unhash_sk+0x345/0x4a0 [ 27.144846] Kernel panic - not syncing: panic_on_warn set ... [ 27.144846] [ 27.152200] CPU: 1 PID: 4507 Comm: syz-executor666 Not tainted 4.17.0-rc3+ #37 [ 27.159545] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 27.168883] Call Trace: [ 27.171459] dump_stack+0x1b9/0x294 [ 27.175070] ? dump_stack_print_info.cold.2+0x52/0x52 [ 27.180257] ? smc_unhash_sk+0x320/0x4a0 [ 27.184311] panic+0x22f/0x4de [ 27.187485] ? add_taint.cold.5+0x16/0x16 [ 27.191616] ? __warn.cold.8+0x148/0x1b3 [ 27.195662] ? __warn.cold.8+0x117/0x1b3 [ 27.199704] ? smc_unhash_sk+0x345/0x4a0 [ 27.203744] __warn.cold.8+0x163/0x1b3 [ 27.207610] ? smc_unhash_sk+0x345/0x4a0 [ 27.211661] report_bug+0x252/0x2d0 [ 27.215272] do_error_trap+0x1de/0x490 [ 27.219151] ? graph_lock+0x170/0x170 [ 27.222951] ? math_error+0x420/0x420 [ 27.226747] ? lock_acquire+0x1dc/0x520 [ 27.230712] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 27.235540] do_invalid_op+0x1b/0x20 [ 27.239235] invalid_op+0x14/0x20 [ 27.242669] RIP: 0010:smc_unhash_sk+0x345/0x4a0 [ 27.247316] RSP: 0018:ffff8801b535f488 EFLAGS: 00010293 [ 27.252661] RAX: ffff8801ac472300 RBX: ffff8801d9b6d7c0 RCX: ffffffff873f756e [ 27.259917] RDX: 0000000000000000 RSI: ffffffff873f7625 RDI: 0000000000000005 [ 27.267170] RBP: ffff8801b535f570 R08: ffff8801ac472300 R09: ffffed003b36db08 [ 27.274430] R10: ffffed003b36db08 R11: ffff8801d9b6d843 R12: 1ffff10036a6be95 [ 27.281681] R13: ffff8801b535f548 R14: ffffffff8970b1e0 R15: ffff8801d9b6d840 [ 27.288961] ? smc_unhash_sk+0x28e/0x4a0 [ 27.293014] ? smc_unhash_sk+0x345/0x4a0 [ 27.297067] ? smc_unhash_sk+0x345/0x4a0 [ 27.301119] ? smc_rx_data_available+0x100/0x100 [ 27.305854] ? release_sock+0x1e2/0x2b0 [ 27.309807] ? __local_bh_enable_ip+0x161/0x230 [ 27.314454] ? __release_sock+0x3a0/0x3a0 [ 27.318580] ? smc_release+0x269/0x610 [ 27.322446] ? trace_hardirqs_on+0xd/0x10 [ 27.326574] ? __local_bh_enable_ip+0x161/0x230 [ 27.331229] smc_release+0x36e/0x610 [ 27.334935] sock_release+0x96/0x1b0 [ 27.338631] ? sock_alloc_file+0x4e0/0x4e0 [ 27.342844] sock_close+0x16/0x20 [ 27.346287] __fput+0x34d/0x890 [ 27.349552] ? fput+0x1a0/0x1a0 [ 27.352816] ? _raw_spin_unlock_irq+0x27/0x70 [ 27.357293] ____fput+0x15/0x20 [ 27.360553] task_work_run+0x1e4/0x290 [ 27.364428] ? task_work_cancel+0x240/0x240 [ 27.368743] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 27.374271] ? switch_task_namespaces+0xa2/0xd0 [ 27.378923] do_exit+0x1aee/0x2730 [ 27.382455] ? mm_update_next_owner+0x980/0x980 [ 27.387109] ? find_held_lock+0x36/0x1c0 [ 27.391161] ? lock_downgrade+0x8e0/0x8e0 [ 27.395303] ? lock_downgrade+0x8e0/0x8e0 [ 27.399440] ? kasan_check_read+0x11/0x20 [ 27.403575] ? do_raw_spin_unlock+0x9e/0x2e0 [ 27.407977] ? __local_bh_enable_ip+0x161/0x230 [ 27.412640] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 27.417652] ? release_sock+0x1e2/0x2b0 [ 27.421607] ? trace_hardirqs_on+0xd/0x10 [ 27.425738] ? __local_bh_enable_ip+0x161/0x230 [ 27.430390] ? _raw_spin_unlock_bh+0x30/0x40 [ 27.434783] ? release_sock+0x1e2/0x2b0 [ 27.438740] ? __release_sock+0x3a0/0x3a0 [ 27.442875] ? __local_bh_enable_ip+0x161/0x230 [ 27.447529] ? lock_sock_nested+0xe7/0x120 [ 27.451754] ? smc_sendmsg+0x2d5/0x370 [ 27.455618] ? smc_sendpage+0x1a0/0x1a0 [ 27.459576] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 27.465091] ? sock_sendmsg+0x5a/0x120 [ 27.468959] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 27.474480] ? __sys_sendto+0x475/0x670 [ 27.479998] ? __ia32_sys_getpeername+0xb0/0xb0 [ 27.484651] ? __fd_install+0x2de/0x880 [ 27.488607] ? get_unused_fd_flags+0x190/0x190 [ 27.493172] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 27.498690] ? alloc_file+0x44/0x3e0 [ 27.502391] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 27.509044] ? sock_alloc_file+0x2a4/0x4e0 [ 27.513272] ? __alloc_fd+0x700/0x700 [ 27.517058] ? fd_install+0x4d/0x60 [ 27.520669] do_group_exit+0x16f/0x430 [ 27.524536] ? __ia32_sys_exit+0x50/0x50 [ 27.528585] ? do_syscall_64+0x92/0x800 [ 27.532548] __x64_sys_exit_group+0x3e/0x50 [ 27.536849] do_syscall_64+0x1b1/0x800 [ 27.540716] ? syscall_return_slowpath+0x5c0/0x5c0 [ 27.545633] ? syscall_return_slowpath+0x30f/0x5c0 [ 27.550566] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 27.555917] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 27.561389] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 27.566559] RIP: 0033:0x43e8b8 [ 27.569733] RSP: 002b:00007fff5e865708 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 27.577525] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043e8b8 [ 27.584790] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 27.592051] RBP: 00000000004be260 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 27.599306] R10: 0000000024000004 R11: 0000000000000246 R12: 0000000000000001 [ 27.606558] R13: 00000000006cc160 R14: 0000000000000000 R15: 0000000000000000 [ 27.614547] Dumping ftrace buffer: [ 27.618181] (ftrace buffer empty) [ 27.621871] Kernel Offset: disabled [ 27.625482] Rebooting in 86400 seconds..